>>89295105A full Holoen League collab is not impossible.
Step 1, Gigi gets Nerissa. Just bully her a little and she'll relapse into League.
Step 2, Gigi gets Bae. She played it once, called jungle "forest". Just tell her Gigi can teach her Akali (whether this is true or not is irrelevant).
Step 3, with the combined power of Gigi's raw charm, Nerissa's wet cat pleads and Bae's (sexual) relationship with them, get Mumei and/or Biboo.
Step 4. Now you got either 4 or 5 people. If you have 4, then at that point you can just ask who wants to fill in. I'd recommend Fauna to add a funny little "oh Dota does this better btw" every once in a while.
I have peered into the future thanks to a high-grade Murinium overdose caused by this past week, this is in fact Gigi's battleplan.